Why compress to this size?
100 KB comfortably fits a resume photo or profile picture with room for good detail, while staying well under most upload limits.
About JPG compression
JPG has an adjustable quality setting, so PhotoToolKit searches for the highest quality that still fits your target size. It's usually the best choice for ordinary photos.
Frequently asked questions
How do I compress a JPG to 100 KB?
Drop your file into the tool above, make sure the target is set to 100 KB (JPG), then click Compress image. The file downloads straight to your device once it's done — nothing is uploaded to get there.
Will this reduce image quality?
Some quality is traded for file size, but PhotoToolKit looks for the highest quality that still fits your target, so the result stays as sharp as your size limit allows.
Is this really free and private?
Yes. There's no account, no ads, and no upload — the image is compressed using your own browser and never leaves your device.
Compressing more than one? Try Bulk Compress